17 Couplings of rubber for pipes; seal devices for use in plumbing, building, or construction, namely, polymer closures to effect an air and/or watertight seal; seal devices made wholly or partly of rubber or plastic or incorporating rubber or plastic components for use in plumbing, building, or construction, namely, flexible boots, primarily non-metal watertight cones, closures, namely, polymer closures, and watertight or hermetic unfitted covers in the nature of insulating material, all for sealing roof penetrations and roof-mounted element; seal devices for use in sealing about a member extending through an aperture in another member, namely, primarily non-metal sealing rings for use as connections seals; sheet material for use in plumbing, building, or construction principally made of rubber or plastic material with or without internal reinforcement; shock buffers and rubber fenders for use in plumbing, building, or construction not being parts of ships or railway rolling stock; hoses for use in plumbing, building, or construction not being metal hoses; rollers and extruded and moulded sections for use in plumbing, building, or construction made of rubber or plastic; rubber and plastic mouldings for use in plumbing, building, or construction; washers for use in plumbing, building, or construction made of rubber or plastic material and with or without metal caps; rubber washers for use in plumbing, building, or construction; washers of rubber or vulcanized fiber for use in plumbing, building, or construction; combination seals of rubber for use in plumbing, building, or construction; seals of rubber for use in plumbing, building, or construction; rubber sealing materials for use in plumbing, building, or construction; thermoplastic sealing materials for use in plumbing, building, or construction; silicone rubber sealants for use in plumbing, building, or construction; plastic seals for use in plumbing, building, or construction; non-metallic seals for joints for use in plumbing, building, or construction; non-metallic weather seals for use in plumbing, building, or construction; elastomeric expansion joints for use in plumbing, building, or construction; flexible expansion joints for use in plumbing, building, or construction; flexible fillers, sealing or caulking compounds for use in plumbing, building, or construction; jointing materials and strips for use in plumbing, building, or construction; joint sealants for use in plumbing, building, or construction; joint sealing compounds for use in plumbing, building, or construction; non-metallic pipe couplings for use in plumbing, building, or construction; non-metallic shear banded couplings for use in plumbing, building, or construction; non-metallic gibault joints for use in plumbing, building, or construction; non-metallic bushings for use in plumbing, building, or construction; grates for use in plumbing, building, or construction; non-metallic grates and receptacles for trapping silt; covers of plastic for utility hydrants; clamps of plastic or rubber for use in plumbing, building, or construction; posts of plastic for marking utilities