Plastic. These tubing clamps are durable and will not rust or corrode. Three sizes are available for best tubing fit.

• Mini tube clamp with single position on/off gives positive shut-off with fingertip control; use for thin-walled tubing under 4,7 mm (³⁄₁₆") Ext.Ø
• Mid-range clamp has a 15-position stepped adjustment that controls flow from full open to complete closure; fits tubing from 3,2 to 11 mm (⅛ to ⁷⁄₁₆") Ext.Ø
• Maxi clamp has a 12-position ratchet control from full open to complete closure; fits tubing up to 19 mm (¾") Ext.Ø
• Autoclavable