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Check the listing for details. High-quality upgrade HT-20 Mortar TesterMortar test hammer ehhqqq. Condition: New. Listed at 171.12 USD. (The average rebound values on steel anvil: 74±2. Peer-products is relatively high accuracy, quality and cheap, long service life. 2) Use of super-hard aluminum shell to avoid on-site work injury apparatus, to extend the service life;.