Animal Masks Transparent cone made from high impact plastic with neoprene rubber diaphram. 15mm standard male taper connection fits "Y" or mask elbow directly. 05304 Animal Mask - small 3 1/2" diameter - 3" deep 05305 Animal Mask - large 5" diameter - 4 1/2" deep 05308 Animal Mask - extra large 5" diameter - 7" deep 05306 Replacement Diaphragm - small 05307 Replacement Diaphragm - large + extra large