Holmarc Opto-Mechatronics Pvt. Ltd. Manufactures Post Mounting Holder with Black Anodized Finish. Holmarc Opto-Mechatronics Pvt. Ltd. Supplies precision manipulators. Post Mounting Holder is made of aluminum alloy. Post Mounting Holder is available in black anodized finish. These post holders are available in different models and in the length varies from 30mm to 125mm.