Curtis Industries 4-Step block Curtis industries| Curtis Industries 4-Step block Print Curtis industries| Curtis Industries 4-Step block 4-step calibration block for thickness and linearity calibration. 7.62cm L x 1.91cm W (3.00"L x 0.75"W); in 0.25cm to 2.54cm H (0.100" to 1.000"H) increments. Standard materials available: Aluminum (7075), Stainless (304) and Steel (1018). Special materials also available: Aluminum (2024, 6061), Brass, Copper, Cupro-Nickel, Hastelloy (C or X), Inconel (600 or 625), Monel 400, Nickel, Stainless (316 or 321), Steel 4340, Titanium, Titanium 6/4 and Zirconium. QXX-5050: 4-step block, steel 1018, with certificate - 0.25cm to 2.54cm (0.1" to 1.0"). QXX-5050A: 4-step block, 7075 aluminum, with certificate - 0.25cm to 2.54cm (0.1" to 1.0"). QXX-5052: 4-step block, 304 stainless, with certificate - 0.25cm to 2.54cm (0.1" to 1.0"). Option HC-SB: Standard hardwood case for step blocks. Request for information