For 3/4" Tubing - SIZE: 256R     |   Crimp Clamps   |     |   Description   |    SKU   |    Ear Width   |    Open/Close Range (mm)   |    Open/Close Range (inches)   |     |   ½”   |    210R   |    9mm   |    18.2 - 21.0   |    .72 - .83   |     |   ¾”   |    256R   |    9mm   |    22.8 - 25.6   |    .90 - 1.01   |     |   1”   |    331R   |    10mm   |    30.0 - 33.1   |    1.18 - 1.30   |     |   1 ¼”   |    425R   |    10mm   |    39.4 - 42.5   |    1.55 - 1.67   |       https://www.ndspro.com/256r-3-4-ss-pinch-clamp.html   |