Man, I don't know how to condense this into a readable format, but I don't believe QTUO Studios is a manufacturer. Let's try bullet points. QTUO Studios was introduced to me by a contact from Tecsee QTUO Studios started as an authorized reseller of SP Star switches That same representative of Tecsee left Tecsee to work at QTUO A "familiar representative" to Bolsa introduced them to QTUO Bolsa has previously worked nearly exclusively with Tecsee except that time that they were tricked by another "new manufacturer" who was actually just reselling BSUN switches Regardless, these switches use a proprietary blend called Q1 for the housing which is an LY and UHMWPE blend (can you do that? Can you combine a proprietary blend into another proprietary blend? Will this never end?) and a POK and UHMWPE blend called PO3 for the stem. Bottom Out: 42g Actuation: 2.0mm Bottom Out: 3.6mm