1-1/4" flexible coupling. Durable, flexible PVC. A = the I.D. (inside diameter) of side No. 1. B = the I.D. of side No. 2. C = the length of the actual coupling, end-to-end. Size: 1-1/4" Pipe Size, Dimensions: 1.70" (A) x 1.70" (B) x 3.40" (C), Material: Elastomeric Polyvinyl Chloride, Type: Plastic to Plastic No. P1056-150: Size: 1-1/2" Pipe Size, Dimensions: 1.95" (A) x 1.95" (B) x 3.40" (C), Material: Elastomeric Polyvinyl Chloride, Type: Plastic to Plastic No. P1056-22: Size: 2" x 2" Pipe Size, Dimensions: 2.45" (A) x 2.45" (B) x 3.40" (C), Material: Elastomeric Polyvinyl Chloride, Type: Plastic to Plastic No. P1056-33: Size: 3" x 3" Pipe Size, Dimensions: 3.45" (A) x 3.45" (B) x 3.95" (C), Material: Elastomeric Polyvinyl Chloride, Type: Plastic to Plastic No. P1056-44: Size: 4" x 4" Pipe Size, Dimensions: 4.45" (A) x 4.45" (B) x 4.20" (C), Material: Elastomeric Polyvinyl Chloride, Type: Plastic to Plastic No. P1056-66: Size: 6" x 6" Pipe Size, Dimensions: 6.45" (A) x 6.45" (B) x 5.70" (C), Material: Elastomeric Polyvinyl Chloride, Type: Plastic to PlasticBICW